[MARMOTTA-495] KiWi SPARQL: support for GROUP BY

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0
• Component/s: KiWi Triple Store
• Assignee: Sebastian Schaffert
• Reporter: Sebastian Schaffert
• Created: 28/Apr/14 08:35
• Updated: 16/Dec/14 09:59
• Resolved: 16/Sep/14 16:44

Description

We should add support for grouping by certain variable bindings. This can be a bit challenging in case the group by contains expressions, but should be doable.